Quick definitions from WordNet (obstruction)▸ noun:getting in someone's way▸ noun:the act of obstructing ("Obstruction of justice")▸ noun:any structure that makes progress difficult▸ noun:the state or condition of being obstructed▸ noun:something immaterial that stands in the way and must be circumvented or surmounted ("The filibuster was a major obstruction to the success of their plan")
▸ Word origin